Improved stump-pulling machine



UNITED STATES PATENT OFFICE.

A. E. BOYNTON, OF HARTFORD, WISCONSIN, AND G. R. BOYNTON, OF CHICAGO, ILLINOIS.

IMPROVED STUMP-PULLING MACHINE.`

Specification forming part of Letters Patent No. 38,092, dated April 7, 1863.

T 0 afZZ whom it may concern.-

Be it known that we, AIKTN E. BoYNToN, of Hartford, county of Washington, State of Wisconsin, and GEORGE R. BoYN'roN, of the city of Chicago, county of Cook, State of Illi nois, have invented new and useful improvements in machines for pulling stumps, and also in the manner of loading the same for transportation, ofwhich the following is a full,

clear, and exact description of the same, ref-l erence being had to the annexed drawings, making a part of this specification, in which- Figure 1 is a perspective view 5 Fig. 2, a longitudinal elevation through the center 5 Fig. 3, a transverse section between the beams A A; and Fig. 4 is a section showing the positions of the lever E when in use, and also the operation and diii'erent positions of the fulcrum G when in use.

To enable those skilled in the art to make and use our invention, we will proceed to describe its construction and operation.

A A, Fig. l, are beams strongly supported upon posts B B, 81e., said posts resting firmly upon shoes or sills c c, the whole being firmly secured together by means of rods running through the sills upward through, and secured on the tops of the beams A A with nuts. rlhe frame D is formed of two planks, a cross-tie being framed across the front ends, and the back end bolted rmly to the beams A A.

, rIhe distance between the sides ot' the frame D is just suiicient to admit the pillow-blocks I I and the bed IL, upon which rests the fulcrum G. The frame D extends forward to support the lifting-frame f, the wheel on, axle An, and roller p.

The frame f is used as a guide to the end of the lever E, and for the purpose ot'raising the same to a proper position for use by means of a rope, t, working over a pulley near the cross head of the frame f ,'1 thence leading to and winding onto the axle u outside of the frame D.

The wheel m is secured to the opposite end of the axle n, and is used to raise the lever' E and also to apply power to the lever E through the medium of the rope r, attached to the end of thelever E; thence leading over the roller p, back to, and winding onto the axle n, between the sides of the frame D, a counter-revolution ofthe wheel m both raising and drawing down the lever, the two ropes t and r working simultaneously on the axle n forthe purposes above specified.

Fig. 2 is a longitudinal elevation snowing zontal position being shown by the dottedl lines E E2, Fig. 4. Z Z, Fig. 2, are strong links suspended on a pin in the opening of the short arm of the lever E, to which may be attached a chain leading to the stump. The lever E is constructed of two planks, the thickness of one plank between the ends, and also where the lever rests upon the fulcrum.

The piece over the fulcium is cut away a portion of its width and length, so as to form a seat for the pawl j, and also a recess into which the pawl may be raised. For loading and transporting said machine a common carriage, eithei` ot' two or four wheels, is placed in position as seen at Fig. 2. l

Upon a frame, 1, is secured pillow-blocks 2 and an elevated frame, 3. The pillow-blocks 2 and frame 3 are of sufcient 'neight to carry the machine clear from the ground when raised upon them. To effect this ajournal, 4, is secured to the pillow-blocks 2, and upon the ends ofthe journal 4. is secured arms or litters 5, and into the journal 4 is inserted a small lever, 6.

When the lever 6 is raised to the position as seen at Fig. 2, the litters will then take under the beam A. The lever being then brought down, the after part of the machine will be raised by the arms 5, which will tilt it until the roller p will rest upon the frame 3. Then the lever 6 being brought to a horizontal position, the machine will be raised and car ried forward until it rests upon thepillowblocks 2 and frame 3A The roller p has a groove around it of suicient dimensions to receive the rope r within the diameter of its periphery, so that it may roll upon the frame 3, thus performing twofold service in the loading of the machine and acting as a. drum for the rope r.

The lever 6 may be operated by a rope attached to the outer end, leading over a pulley secured to the frame l.

Fig. 3 is a transverse section between the beams A A, showing the position of lthe several parts transversely, also the position of the carriage when ready for loading the machine. The suspension-frame K (not shown on Fig. l) is for the purpose of strengthening the beam A, so that the Whole may be made of less weight and possess sufficient strength for the purposes required. This is effected by placing the lower ends of the frame K over the bracing-posts B, with rods through the cross head ot the frame K and through the beam A, secured with nuts.

Fig. 4 shows the different positions of the lever E, and also ofthe fulerum g and the pawl j when the lever e is Worked with the fulcrum stationary and when it is operated by the `pawl j. The lever E being raised to a proper height, the pawl j is allowed to fall into its seat, as seen at Fig. 2. Then upon the elevated end of the lever being brought down the fulcrum g will turn in its seat upon the bed h, the point upon which the lever rests will be raised, as seen at w, Fig. 4, which will bring the lever E to the position indicated by w x.

The object to be obtained is to get a greater lift on the short arm when the full power of the lever is not required. The several arcs described by the lifting-points of the short arm of the lever E are shown at 01 02 03 04 when the lever E is Working With the fulcrum at rest, and when it Works in its seat raised to the position shown at x, and also the arcs described by the long arm. I

Having thus described the several parts and operation of our machine, what We claim as our invention isl. The fulcrum g, or its equivalent, when used substantially as and for the purpose abovev described.

2. The mode of operating the lever E by means ot' the ropes t and r, when used substantially as described.

3. The combination of the several parts when used as and for the purposes hereinbefore described.

4. The manner of loading said machine for transportation When done in the manner substantially as herein described.

AIKIN E. BOYNTON. GEO. R. BOYNTON. 

